Index: src/OFMacros.h
==================================================================
--- src/OFMacros.h
+++ src/OFMacros.h
@@ -12,10 +12,11 @@
 #ifndef OF_CONFIGURED
 #error You are missing the ObjFW definitions!
 #error Please use objfw-config!
 #endif
 
+#include <stddef.h>
 #include <stdint.h>
 
 #ifdef __GNUC__
 #define OF_INLINE inline __attribute__((always_inline))
 #define OF_LIKELY(cond) __builtin_expect(!!(cond), 1)
@@ -42,10 +43,12 @@
 #define OF_AMD64_ASM
 #elif defined(__i386__)
 #define OF_X86_ASM
 #elif defined(__ppc__) || defined(__PPC__)
 #define OF_PPC_ASM
+#elif defined(__arm__) || defined(__ARM__)
+#define OF_ARM_ASM
 #endif
 #endif
 
 #define OF_BSWAP16_CONST(i)					\
 	(((uint16_t)i & UINT16_C(0xFF00)) >> 8 |		\
@@ -70,10 +73,12 @@
 {
 #if defined(OF_X86_ASM) || defined(OF_AMD64_ASM)
 	asm("xchgb	%h0, %b0" : "=Q"(i) : "Q"(i));
 #elif defined(OF_PPC_ASM)
 	asm("lhbrx	%0, 0, %1" : "=r"(i) : "r"(&i), "m"(i));
+#elif defined(OF_ARM_ASM)
+	asm("rev16	%0, %0" : "=r"(i) : "0"(i));
 #else
 	i = (i & UINT16_C(0xFF00)) >> 8 |
 	    (i & UINT16_C(0x00FF)) << 8;
 #endif
 	return i;
@@ -84,10 +89,12 @@
 {
 #if defined(OF_X86_ASM) || defined(OF_AMD64_ASM)
 	asm("bswap	%0" : "=q"(i) : "q"(i));
 #elif defined(OF_PPC_ASM)
 	asm("lwbrx	%0, 0, %1" : "=r"(i) : "r"(&i), "m"(i));
+#elif defined(OF_ARM_ASM)
+	asm("rev	%0, %0" : "=r"(i) : "0"(i));
 #else
 	i = (i & UINT32_C(0xFF000000)) >> 24 |
 	    (i & UINT32_C(0x00FF0000)) >>  8 |
 	    (i & UINT32_C(0x0000FF00)) <<  8 |
 	    (i & UINT32_C(0x000000FF)) << 24;